CN104143649A - Integrated electrolyte storage tank for flow cells - Google Patents

Integrated electrolyte storage tank for flow cells Download PDF

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Publication number
CN104143649A
CN104143649A CN201310167794.6A CN201310167794A CN104143649A CN 104143649 A CN104143649 A CN 104143649A CN 201310167794 A CN201310167794 A CN 201310167794A CN 104143649 A CN104143649 A CN 104143649A
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CN
China
Prior art keywords
storage tank
electrolyte
positive
dividing plate
liquid level
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Pending
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CN201310167794.6A
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Chinese (zh)
Inventor
史丁秦
张华民
李先锋
钟和香
孙佳伟
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Dalian Institute of Chemical Physics of CAS
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Dalian Institute of Chemical Physics of CAS
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Priority to CN201310167794.6A priority Critical patent/CN104143649A/en
Publication of CN104143649A publication Critical patent/CN104143649A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

An integrated electrolyte storage tank for flow cells is disclosed. The integrated electrolyte storage tank is a hollow container, inside which a positive and negative separator plate is vertically arranged so as to divide the inside of the storage tank into a positive cavity and a negative cavity which are not communicated with each other. The positive cavity and the negative cavity have equal cross sectional area in any horizontal plane. The separator plate has through-holes. During the operation process of a flow cell, temperatures of positive and negative electrolyte solutions remain basically consistent all the time, and influence of temperature difference between the positive and negative electrolyte solutions on cell reaction is reduced. Furthermore, cell reaction has synchronism.

Description

A kind of flow battery integrated electrolysis liquid storage tank
Technical field
The present invention relates to a kind of electrolyte solution storage tank for liquid flow energy storage battery, more specifically, the invention provides a kind of method for designing of liquid flow energy storage battery electrolyte solution storage tank.
Background technology
Along with national economy fast development, the present situation of energy shortage and environmental pollution is increasingly severe, and the contradiction between the energy, resources and environment protection also becomes increasingly conspicuous.For realizing sustainable development, adjust current power energy resource structure, exploitation scale utilizes the renewable and clean energy resource such as wind energy, solar energy, has become the fundamental state policy of China's electric power energy development.The renewable energy power generation such as wind energy, solar energy process has unstable and discontinuous feature, need to be equipped with electric power storage energy storage device, could realize continuous, stable electric energy output, avoids partial electric grid to produce the extensive serious accident of impacting and cause.Liquid flow energy storage battery (Redox Flow Battery; be called for short RFB) owing to thering is separate adjustable, the response of power system capacity and power rapidly; safe and reliable; have extended cycle life; Operation and Maintenance is simple; outstanding advantages such as environmental friendliness and become renewable energy power generation, electrical network peak load shifting, one of the most promising technology in the scale energy storage such as emergent and stand-by station.Taking all-vanadium flow battery (Vanadium Redox Flow Battery, VRFB) as the scale electric power storage energy storage device of representative is rapidly developed in recent years, progressively enter extensive demonstration phase.In existing network system, realize " peak load shifting " effect by extensive electric power storage energy storage, can relax imbalance between power supply and demand, improve generating equipment utilance, reduce thermal power generation energy consumption.Conventionally flow battery system is made up of critical pieces such as battery, anodal pipeline, anodal electrolyte solution storage tank, positive pump, negative pole pipeline, anolyte solution storage tank, negative pump.Through anodal pipeline and negative pole pipeline, electrolyte solution is imported to positive pole and the negative pole of battery from anodal electrolyte solution storage tank and anolyte solution storage tank by positive pump and negative pump, and return again in anodal electrolyte solution storage tank and anolyte solution storage tank, realize circulating of liquid in whole battery system.
At present, the problem that liquid flow energy storage battery exists in the time of long-time, many circular flow mainly contains the following aspects, the migration of positive and negative electrode ion and water, diffusion; Electrolyte solution poor stability; Positive and negative electrode electrolyte solution temperature is inconsistent, causes the mutation of polarization response speed difference large, causes degradation under battery efficiency.
A lot of researchers have done certain work on this basis, thus great majority be all between positive and negative electrode electrolyte solution storage tank by making adding of outer member the volume of electrolyte solution be consistent, and then reach the object of reduction capacity attenuation speed.
Summary of the invention
The object of the invention is to provide a kind of electrolyte storage tank of liquid flow energy storage battery, and for achieving the above object, the technical solution used in the present invention is as follows:
A kind of flow battery integrated electrolysis liquid storage tank, described integrated electrolysis liquid storage tank is hollow container, in it, being vertically provided with both positive and negative polarity dividing plate will be divided into mutual disconnected anode chamber and negative pole chamber two parts in storage tank; All equate along the anode chamber of any level face and the cross-sectional area of negative pole chamber; Dividing plate is provided with through hole.
Number >=2, hole on described dividing plate.
In integrated electrolysis liquid storage tank, be filled with electrolyte, the upper end of dividing plate is more than liquid level of electrolyte, and the through hole below liquid level of electrolyte keeps anode chamber and negative pole chamber electrolyte inside to be interconnected; Through hole total effective area below liquid level of electrolyte is the 0.0005%-0.01% of the dividing plate area below liquid level of electrolyte.
Described through hole total effective area below liquid level of electrolyte is the preferred 0.0006%-0.005% of the dividing plate area below liquid level of electrolyte.
Described through hole total effective area below liquid level of electrolyte is the more preferably 0.0008%-0.001% of the dividing plate area below liquid level of electrolyte.
Described divider upright is arranged in storage tank.
Electrolyte storage tank and dividing plate material are PVC, PTFE, PP or PE material.
Flow battery comprises all-vanadium flow battery, full iron flow battery, siderochrome flow battery or ferrovanadium flow battery.
The present invention mention " positive and negative electrode integrated electrolysis matter solution storage tank ", its material can be made for any resistant materials such as PVC, PTFE, PP, PE.
Integrated electrolysis liquid storage tank volume can be for being greater than the arbitrary volume value of 10mL; Its shape can have any shape.
Useful result of the present invention:
(1) the present invention can make flow battery in running, moment keeps positive and negative electrode electrolyte solution temperature to keep basically identical, reduce impact cell reaction being produced due to the difference of positive and negative electrode electrolyte solution temperature, and then made cell reaction have more synchronism.
(2) the present invention can make flow battery in running, by the principle of concentration balance, the concentration of positive and negative electrode electrolyte solution is consistent substantially, reduce the impact bringing to battery efficiency due to the concentration polarization of positive and negative electrode electrolyte solution, and then made battery can keep more stable efficiency value in long-time running.
(3) the present invention can make flow battery in running, by the connection of aperture, can effectively solve the electrolyte solution volume migration problem that battery occurs in long-time running, it is basically identical that the liquid level of positive and negative electrode electrolyte solution keeps, and reduces battery capacity rate of decay.
(4) the method applied in the present invention simple possible, does not need to add any auxiliary element.
(5) the present invention can make two electrolyte solution storage tanks of positive and negative electrode originally become a positive and negative electrode integrated electrolysis matter solution storage tank, so not only reduced whole battery system floor space, saved the set-up time, and reduced cost to a certain extent.
Brief description of the drawings
Fig. 1 illustrates a kind of traditional redox flow cell device, and this device is by 7 flow batteries, 3 anodal electrolyte solution storage tanks, 4 anolyte solution storage tanks, 5 positive pump, 6 negative pump, 1 negative pole pipeline, the parts compositions such as 2 anodal pipelines.
Fig. 2 illustrates a kind of redox flow cell device with positive and negative electrode integrated electrolysis matter solution storage tank, and this device is by 11 flow batteries, 10 positive and negative electrode integrated electrolysis matter solution storage tanks, 12 apertures, 13 dividing plates, 8 positive pump, the parts compositions such as 9 negative pump and positive and negative electrode pipeline.
Embodiment
Embodiment further illustrates of the present invention, instead of limits the scope of the invention.
Integrated electrolysis liquid storage tank described in embodiment is the square container of a top end opening, and this integrated electrolysis liquid storage tank is divided into integrated electrolysis liquid storage tank by the dividing plate perpendicular to bottom the two parts that all equate along the anode chamber of any level face and the cross-sectional area of negative pole chamber.And on the dividing plate below liquid level, be provided with through hole, make both positive and negative polarity electrolyte keep being communicated with.
Flow battery system selected in embodiment is vanadium redox battery, is described as follows:
1. this battery is made up of 10 joint monocells;
2. this battery electrode area is 1000cm 2;
3. vanadium concentration of electrolyte solutions is 1.5mol/L;
4. the current density of battery constant current charging-discharging is 80mA/cm 2;
5. single battery discharges and recharges cut-off battery and is respectively 1.55V and 1.0V;
6. in positive and negative electrode integrated electrolysis liquid fluid reservoir, respectively pack 40L vanadium electrolyte solution into, the following dividing plate area of liquid level is 4000cm 2, liquid level elemental height is 80cm.
Embodiment 1
On positive and negative electrode integrated electrolysis matter solution storage tank dividing plate, the effective area of aperture is 2mm 2time, 200 charge and discharge cycles of battery operation, record data.
Embodiment 2
On positive and negative electrode integrated electrolysis matter solution storage tank dividing plate, the effective area of aperture is 5mm 2time, 200 charge and discharge cycles of battery operation, record data.
Embodiment 3
On positive and negative electrode integrated electrolysis matter solution storage tank dividing plate, the effective area of aperture is 10mm 2time, 200 charge and discharge cycles of battery operation, record data.
Embodiment 4
On positive and negative electrode integrated electrolysis matter solution storage tank dividing plate, the effective area of aperture is 15mm 2time, 200 charge and discharge cycles of battery operation, record data.
Embodiment 5
On positive and negative electrode integrated electrolysis matter solution storage tank dividing plate, the effective area of aperture is 20mm 2time, 200 charge and discharge cycles of battery operation, record data.
Embodiment 6
On positive and negative electrode integrated electrolysis matter solution storage tank dividing plate, the effective area of aperture is 25mm 2time, 200 charge and discharge cycles of battery operation, record data.
Embodiment 7
On positive and negative electrode integrated electrolysis matter solution storage tank dividing plate, the effective area of aperture is 30mm 2time, 200 charge and discharge cycles of battery operation, record data.
Embodiment 8
On positive and negative electrode integrated electrolysis matter solution storage tank dividing plate, the effective area of aperture is 40mm 2time, 200 charge and discharge cycles of battery operation, record data.
Comparative example 1
Adopt traditional approach to test battery.Structure as shown in Figure 1.200 circulations of battery operation, record data.
Test
Adopt Arbin BT-2000 battery charging and discharging instrument (manufacture of Arbin company of the U.S.) test battery performance; Adopt thermometer measure positive and negative electrode electrolyte solution temperature value; Adopt potentiometric titrimeter to measure positive and negative electrode concentration of electrolyte solutions value; Adopt ruler to measure positive and negative electrode electrolyte solution liquid level poor.
Test result as shown in Table 1.
Explanation
In table one, CE is the average coulombic efficiency value in 200 charge and discharge cycles of experiment operation; EE is the average energy efficiency value in 200 charge and discharge cycles of experiment operation; Both positive and negative polarity electrolyte solution temperature difference is record value after the 200th charge and discharge cycles of experiment operation; Both positive and negative polarity electrolyte solution amount of substance is poor is record value after the 200th charge and discharge cycles of experiment operation; Both positive and negative polarity electrolyte solution volume differences is record value after the 200th charge and discharge cycles of experiment operation.
Table one
As can be seen from the above table, flow battery according to the present invention is after through 200 charge and discharge cycles, 1. the coulombic efficiency of battery remains on more than 77%, the energy efficiency of battery remains on more than 68%, and in the time of suitable aperture area, the coulombic efficiency of battery and traditional flow battery (comparative example one) are suitable, but the energy efficiency of battery will be higher than the energy efficiency of traditional flow battery (comparative example one); 2. the temperature of positive and negative electrode electrolyte solution is basically identical, has avoided because the impact that the temperature difference is brought cell reaction; 3. both positive and negative polarity electrolyte solution amount of substance is basically identical, has effectively kept the quantity of active material; 4. positive and negative electrode electrolyte solution liquid level difference phenomenon is not obvious.
By contrast, not adopting in the experiment of invention, after 200 charge and discharge cycles of flow battery operation, temperature, amount of substance, the liquid level of the positive and negative electrode electrolyte solution of battery have obvious variation.This is the efficiency to battery long-time running and capacity generation adverse influence all.

Claims (6)

1. a flow battery integrated electrolysis liquid storage tank, is characterized in that: described integrated electrolysis liquid storage tank is hollow container, and in it, being vertically provided with both positive and negative polarity dividing plate will be divided into mutual disconnected anode chamber and negative pole chamber two parts in storage tank; All equate along the anode chamber of any level face and the cross-sectional area of negative pole chamber; Dividing plate is provided with through hole.
2. integrated electrolysis liquid storage tank according to claim 1, is characterized in that: number >=2, hole on described dividing plate.
3. integrated electrolysis liquid storage tank according to claim 1, it is characterized in that: in integrated electrolysis liquid storage tank, be filled with electrolyte, the upper end of dividing plate is more than liquid level of electrolyte, and the through hole below liquid level of electrolyte keeps anode chamber and negative pole chamber electrolyte inside to be interconnected; Through hole total effective area below liquid level of electrolyte is the 0.0005%-0.01% of the dividing plate area below liquid level of electrolyte.
4. integrated electrolysis liquid storage tank according to claim 3, is characterized in that: described through hole total effective area below liquid level of electrolyte is the preferred 0.0006%-0.005% of the dividing plate area below liquid level of electrolyte.
5. integrated electrolysis liquid storage tank according to claim 3, is characterized in that: described through hole total effective area below liquid level of electrolyte is the more preferably 0.0008%-0.001% of the dividing plate area below liquid level of electrolyte.
6. integrated electrolysis liquid storage tank according to claim 1, is characterized in that: described divider upright is arranged in storage tank.
CN201310167794.6A 2013-05-09 2013-05-09 Integrated electrolyte storage tank for flow cells Pending CN104143649A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018201070A1 (en) * 2017-04-28 2018-11-01 Ess Tech, Inc. Integrated hydrogen recycle system using pressurized multichamber tank
WO2019208431A1 (en) * 2018-04-24 2019-10-31 昭和電工株式会社 Redox flow battery and operation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102055000A (en) * 2009-10-29 2011-05-11 北京普能世纪科技有限公司 Redox flow battery and method for enabling battery to operate continuously for long time
CN102089918A (en) * 2008-07-07 2011-06-08 伊奈沃特公司 Redox flow battery system for distributed energy storage
CN102593490A (en) * 2012-03-06 2012-07-18 北京百能汇通科技股份有限公司 Flow battery system and battery storage tank
CN203674320U (en) * 2013-05-09 2014-06-25 中国科学院大连化学物理研究所 Electrolyte storage tank for redox flow cell

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102089918A (en) * 2008-07-07 2011-06-08 伊奈沃特公司 Redox flow battery system for distributed energy storage
CN102055000A (en) * 2009-10-29 2011-05-11 北京普能世纪科技有限公司 Redox flow battery and method for enabling battery to operate continuously for long time
CN102593490A (en) * 2012-03-06 2012-07-18 北京百能汇通科技股份有限公司 Flow battery system and battery storage tank
CN203674320U (en) * 2013-05-09 2014-06-25 中国科学院大连化学物理研究所 Electrolyte storage tank for redox flow cell

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018201070A1 (en) * 2017-04-28 2018-11-01 Ess Tech, Inc. Integrated hydrogen recycle system using pressurized multichamber tank
CN110582878A (en) * 2017-04-28 2019-12-17 Ess技术有限公司 Integrated water circulation system using pressurized multi-chamber tank
US11228052B2 (en) 2017-04-28 2022-01-18 Ess Tech, Inc. Integrated hydrogen recycle system using pressurized multichamber tank
CN110582878B (en) * 2017-04-28 2023-10-31 Ess技术有限公司 Integrated water circulation system using pressurized multi-chamber tank
WO2019208431A1 (en) * 2018-04-24 2019-10-31 昭和電工株式会社 Redox flow battery and operation method thereof
JPWO2019208431A1 (en) * 2018-04-24 2021-05-13 昭和電工株式会社 Redox flow battery and its operation method
JP7216080B2 (en) 2018-04-24 2023-01-31 昭和電工株式会社 Redox flow battery and its operation method

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Application publication date: 20141112